Inkjet printer and maintenance method thereof

Details Inkjet printer and maintenance method thereof Inkjet printer and maintenance method thereof

2007-03-24

2010-02-23

Huffman, Julian D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07665821

ABSTRACT:
In an inkjet printer according to an aspect, a print head includes a nozzle and ejects ink through the nozzle. A maintenance unit performs a maintenance operation to recover an ejection state of the nozzle. A sealing unit selectively exposes and seals the nozzle. A first timer unit measures a sealing time when the sealing unit seals the nozzle. A second timer unit measures an exposing time when the sealing unit exposes the nozzle. A dryness obtaining unit obtains a dryness level of the nozzle based on the sealing time and the exposing time. A limit level storing unit stores a predetermined dryness level as a limit level. A control unit activates the maintenance unit when the obtained dryness level is equal to or above the limit level.

REFERENCES:
patent: 6299277 (2001-10-01), Fujii
patent: 6880913 (2005-04-01), Suzuki
patent: 7354132 (2008-04-01), Suzuki
patent: H10-146993 (1998-06-01), None

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